Chemistry Review (7th gr)

What are electrons in the outermost shell of an atom called?

• Neutrons

• Valence Electrons

• Proton Count

• Electron Cloud

Which subatomic particles have a negative charge?

• Protons

• Neutrons

• Electrons

• Isotopes

Tags

NGSS.MS-PS2-3

What is a neutral atom?

• An atom with more protons than electrons

• An atom with equal numbers of protons and electrons

• An atom with more electrons than protons

• An atom with no neutrons

What is the majority composition of an atom's mass?

• Electrons

• Neutrons and protons

• Electron cloud

• Valence electrons

What is the majority composition of an atom's volume?

• Neutrons

• Protons

• empty space

• Valence electrons

What are regions around the nucleus containing electrons called?

• Electron Shells

• Neutron Count

• Proton Count

• Isotopes

How is the proton count of an element determined?

• By the mass number

• By the atomic number

• By the neutron count

• By the electron cloud

How is the neutron count calculated?

• By adding protons and electrons

• By subtracting protons from mass number

• By adding protons and neutrons

• By subtracting electrons from mass number

Where are electrons likely to be found in an atom?

• Neutron cloud

• Proton shell

• Electron cloud

• Valence shell

Tags

NGSS.HS-PS1-1

What is the charge of neutrons compared to electrons?

• Neutrons are positively charged; electrons are neutral

• Neutrons are neutral; electrons are negatively charged

• Neutrons are negatively charged; electrons are neutral

• Neutrons are positively charged; electrons are negatively charged